Sulfur hexafluoride gas pressure relief ring main unit

Abstract

The invention relates to the technical field of ring main units, and discloses a sulfur hexafluoride gas pressure relief ring main unit, which comprises a cabinet body, a cabinet door, a display, a sealing door and a base, the cabinet door is arranged on the surface of the cabinet body, the display is fixedly connected with the surface of the cabinet door, the sealing door is arranged on the surface of the cabinet body, and the base is fixedly connected with the display. The base is located at the lower end of the cabinet body, a sealing device is arranged on the surface of the sealing door, the sealing device comprises a connecting groove and a rubber ring, and the connecting groove is formed in the surface of the cabinet body. By arranging the sealing device and the auxiliary assembly, the sealing door is effectively and tightly combined, the effect of tightly installing the sealing door and the surface of the cabinet body is achieved, the sealing door and the cabinet body are difficult to seal through existing equipment, sulfur hexafluoride gas in the equipment is likely to leak, and the safety of the equipment is improved. And the situation that the body of a user is injured due to inhalation is easily caused is avoided, and the tightness and reliability of sealing are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of ring main unit, in particular to a sulfur hexafluoride gas pressure relief ring main unit. Background Art

[0002] At present, the insulation of 10kV ring main unit is mainly gas insulation, solid insulation and environmentally friendly gas insulation. The gas insulation is currently mainly SF6 gas. The chemical properties of SF6 gas are very stable, and it has excellent insulation and arc extinguishing performance. The SF6 gas insulated ring main unit is small in size, compact in structure and highly adaptable.

[0003] Prior art, such as publication number CN114142385A, discloses a 10kV sulfur hexafluoride gas pressure relief ring network cabinet. The patent adopts a cabinet body and a U-shaped cover, wherein a cabinet door is arranged on the cabinet body, pressure relief ports are respectively opened on both sides of the cabinet body, pressure relief windows are fixedly installed outside the pressure relief ports, the U-shaped cover is arranged outside the cabinet body and is fixedly connected to the cabinet body, a through hole is opened on the top of the U-shaped cover, a second pressure relief component is arranged above the through hole, the second pressure relief component comprises a mounting frame and a top cover, square air outlets are opened around the mounting frame and the bottom end is fixedly connected to the U-shaped cover, side cover plates are arranged on the outside of the square air outlets, the top end of the side cover plates is rotatably connected to the mounting frame, the top cover is sleeved on the mounting frame and the top end of the side cover plates, and a reset component for resetting the top cover is also arranged in the mounting frame; the present invention solves the problems of poor safety during pressure relief in the ring network cabinet of the prior art.

[0004] In daily work, when the equipment is in use, it is difficult for existing equipment to seal the sealing door and the cabinet, which may easily cause the sulfur hexafluoride gas inside the equipment to leak and cause physical damage to the user by inhalation. Summary of the invention

[0005] The object of the present invention is to provide a sulfur hexafluoride gas pressure relief ring network cabinet to solve the problems raised by the above-mentioned background technology.

[0006] To solve the technical problem, the present invention is achieved through the following technical solutions: a sulfur hexafluoride gas pressure relief ring network cabinet, comprising a cabinet body, a cabinet door, a display, a sealing door and a base, wherein the cabinet door is arranged on the surface of the cabinet body, the display is fixedly connected on the surface of the cabinet door, the sealing door is arranged on the surface of the cabinet body, the base is arranged at the lower end of the cabinet body, and a sealing device is arranged on the surface of the sealing door, the sealing device comprises a connecting groove and a rubber ring, the connecting groove is opened on the surface of the cabinet body, the rubber ring is fixedly connected inside the connecting groove, a sealing groove is opened inside the connecting groove, the sealing door is arranged inside the connecting groove, a clamping ring is fixedly connected to a side of the sealing door close to the connecting groove, the clamping ring is arranged inside the sealing groove, a sealing ring is fixedly connected to an end of the clamping ring away from the sealing door, the sealing ring is arranged inside the sealing groove, and two connecting arms are arranged on one side of the surface of the sealing door, and the two connecting arms are connected by a connecting column.

[0007] Furthermore, the two connecting arms are rotatably connected to a first connecting block at one end away from the sealing door, and the first connecting block is fixedly connected to the side of the cabinet. By setting the connecting arm and the first connecting block, the connecting arm can be rotated and moved inside the first connecting block, thereby reducing the situation where the connecting arm is difficult to move and rotate when the equipment is in use, making it difficult for the sealing door to effectively detach from the cabinet.

[0008] Furthermore, a second connecting block is fixedly connected to the side of the cabinet, and a gas rod is rotatably connected inside the second connecting block. The gas rod is provided to facilitate the movement of the connecting column and the sealing door.

[0009] Furthermore, one end of the gas rod away from the second connecting block is fixedly connected with a connecting head, and the connecting head is rotatably connected to the surface of the connecting column. The connecting head is provided to facilitate the movement and rotation of the connecting column.

[0010] Furthermore, an auxiliary component is provided on the side of the sealing door, and the auxiliary component includes a connecting plate and a mounting block, the connecting plate is fixedly connected to the side of the sealing door, the mounting block is fixedly connected to the side of the cabinet, one end of the mounting block is rotatably connected to a swivel head, the end of the swivel head away from the mounting block is fixedly connected to a swivel column, and the end of the swivel column away from the swivel head is fixedly connected to a fixed block, a fixing groove is provided on the surface of the connecting plate, the fixing block is located inside the fixing groove and is clamped, a connecting ring is fixedly connected to the surface of the swivel column, a moving ring is slidably connected to the surface of the moving ring, and a first spring is fixedly connected to the surface of the moving ring, and the first spring is fixedly connected to the surface of the connecting ring at one end away from the connecting ring. The first spring is provided to provide a reset elastic force for the moving ring, so that the clamping block can be tightly clamped in the clamping groove, thereby ensuring the stability of the sealing door after auxiliary fixation. At the same time, during the operation process of rotating the swivel column, the elastic buffer of the spring can also reduce the impact force between components, and avoid damage to components due to excessive force.

[0011] Furthermore, the lower end of the movable ring is rotatably connected to a rotating arm, and one end of the rotating arm away from the movable ring is fixedly connected to a clamping block, and the clamping block is provided to facilitate limiting the position of the rotating arm.

[0012] Furthermore, a slot is provided on a side surface of the mounting block, and the locking block is locked inside the slot.

[0013] Furthermore, a pressure reducing device is provided inside the surface of the sealing door, and the pressure reducing device comprises a pressure reducing hood and a baffle, the pressure reducing hood is fixedly connected to the surface of the sealing door, the baffle is arranged inside the pressure reducing hood, rubber strips are fixedly connected to the sides around the baffle, a sliding rod is fixedly connected to the inside of the pressure reducing hood, the sliding rod is slidably connected to the inside of the baffle, one end of the sliding rod away from the pressure reducing hood is fixedly connected to a limiting block, a second spring is sleeved on the surface of the sliding rod, two ends of the second spring are respectively fixedly connected to the surface of the baffle and the inside of the pressure reducing hood, and the surface of the pressure reducing hood is fixedly connected to the limiting rod, and the second spring is provided to provide the baffle with a reset elastic force, so that the baffle can return to its initial position after the pressure is normal, thereby ensuring that the pressure reducing device can be reused and continuously exert the pressure reducing function.

[0014] Furthermore, a protective plate is slidably connected to the surface of the limit rod, and a blocking block is fixedly connected to one end of the limit rod away from the decompression hood. The protective plate is provided to protect the exhaust hole.

[0015] Furthermore, a third spring is sleeved and connected to the surface of the limit rod, and two ends of the third spring are respectively located on the surface of the protective plate and the surface of the blocking block and fixedly connected. The third spring is provided to facilitate applying a reset elastic force to the protective plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is provided with a sealing device and an auxiliary component. When the equipment is in use, the user rotates the sealing door to combine with the surface of the cabinet, and then starts the gas rod to drive the connecting head to move and drive the connecting column to move. When the connecting column moves, it drives the connecting arm to move the sealing door, and then the connecting arm moves inside the first connecting block, and the sealing door is clamped inside the connecting groove on the surface of the cabinet, and then the clamping ring is set inside the sealing groove, and then the rubber ring is combined with the surface of the sealing door. When the clamping ring is squeezed inside the sealing groove, the sealing ring and the inside of the sealing groove are completely filled. After the sealing door is combined with the cabinet, the user rotates the rotating column to drive the rotating head to rotate inside the mounting block, and then pulls the rotating column to drive the rotating head to move inside the mounting block, and then the rotating column drives the fixed block to clamp inside the connecting plate, and then pulls the rotating arm to drive the moving ring to move on the surface of the rotating column. When the moving ring moves, it drives the first spring to displace and deform to generate elastic force, and then the moving ring drives the connecting ring to move the rotating column and the rotating head inside the mounting block through the first spring, and when the rotating column moves, it drives the fixed block to clamp inside the fixed groove, and the rotating rotating arm and the installation The lower end of the mounting block is set, and the rotating arm is then released, and then the first spring drives the moving ring to be set on the side of the rotating arm and the mounting block, and the rotating arm drives the card block to be connected with the internal card slot to tighten the sealing door at one end of the connecting plate to combine with the cabinet body. By setting a sealing device and an auxiliary component, the sealing door is effectively tightly combined, and the sealing door and the cabinet surface are tightly installed. It is difficult for existing equipment to seal between the sealing door and the cabinet body, which is easy to cause the sulfur hexafluoride gas inside the equipment to leak, and it is easy to cause the user to inhale and cause physical damage. This sealing device, through the cooperation of rubber rings, card rings, sealing rings and gas rods, can quickly install and combine the sealing door and the cabinet body for preliminary sealing. At the same time, the auxiliary components, with the help of the rotating head, rotating column, fixed block and related springs, card blocks and other components, tightly combine the sealing door and the cabinet body, greatly improving the tightness and reliability of the seal, effectively preventing the leakage of sulfur hexafluoride gas, ensuring the safe and stable operation of the ring network cabinet and the safety of the surrounding environment, and improving the use and installation efficiency.

[0017] 2. The present invention provides a decompression device. When the equipment is in use, when an arc is generated inside the cabinet, the sulfur hexafluoride gas expands, and then the gas pushes the baffle to move. When the baffle moves, it drives the rubber strip to move inside the decompression cover. Then the baffle moves on the surface of the slide rod. When the baffle moves, it drives the second spring to displace and deform to generate elastic force. When the baffle moves, it squeezes the air inside the decompression cover. Then the air inside the decompression cover pushes the protective plate to move on the surface of the limit rod. When the protective plate moves, it drives the third spring to displace and deform to generate elastic force to decompress the sulfur hexafluoride gas inside the equipment. By providing the decompression device, the gas inside the equipment is effectively decompressed. The decompression device can effectively reduce the pressure of the sulfur hexafluoride gas in the cabinet by cooperating with the decompression hood, baffle, spring and protective plate. Compared with the equipment without decompression measures, the adaptability of the equipment to gas expansion is greatly improved, and the service life of the equipment is prolonged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a sulfur hexafluoride gas pressure relief ring network cabinet of the present invention; Figure 2 It is a side structural schematic diagram of a sulfur hexafluoride gas pressure relief ring network cabinet of the present invention; Figure 3 A sulfur hexafluoride gas pressure relief ring network cabinet according to the present invention Figure 2 Schematic diagram of the structure at A in the middle; Figure 4 It is a partial structural schematic diagram of a sulfur hexafluoride gas pressure relief ring network cabinet of the present invention; Figure 5 A sulfur hexafluoride gas pressure relief ring network cabinet according to the present invention Figure 4 Schematic diagram of the structure at B in the middle; Figure 6 A sulfur hexafluoride gas pressure relief ring network cabinet according to the present invention Figure 4 Schematic diagram of the structure at C in the middle; Figure 7 A sulfur hexafluoride gas pressure relief ring network cabinet according to the present invention Figure 4 Schematic diagram of the structure at point D in the middle.

[0019] In the figure: 1, cabinet; 2, cabinet door; 3, display; 4, sealing door; 5, base; 6, sealing device; 61, connecting groove; 62, rubber ring; 63, sealing groove; 64, clamping ring; 65, sealing ring; 66, connecting arm; 67, first connecting block; 68, connecting column; 69, second connecting block; 610, gas rod; 611, connecting head; 7, auxiliary component; 71, connecting plate; 72, mounting block; 73, rotating Column; 74, fixed block; 75, fixed groove; 76, rotating head; 77, connecting ring; 78, movable ring; 79, first spring; 710, rotating arm; 711, slot; 712, block; 8, decompression device; 81, decompression cover; 82, baffle; 83, rubber strip; 84, sliding rod; 85, limit block; 86, second spring; 87, protective plate; 88, limit rod; 89, blocking block; 810, third spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-Figure 7 As shown, the present invention provides a technical solution: including a cabinet body 1, a cabinet door 2, a display 3, a sealing door 4 and a base 5, the cabinet door 2 is arranged on the surface of the cabinet body 1, the display 3 is located on the surface of the cabinet door 2 and is fixedly connected, the sealing door 4 is located on the surface of the cabinet body 1, and the base 5 is located at the lower end of the cabinet body 1.

[0022] according to Figure 1-Figure 5 As shown, a sealing device 6 is provided on the surface of the sealing door 4, and the sealing device 6 includes a connecting groove 61 and a rubber ring 62. The connecting groove 61 is opened on the surface of the cabinet 1, and the rubber ring 62 is located inside the connecting groove 61 and fixedly connected. A sealing groove 63 is opened inside the connecting groove 61, and the sealing door 4 is located inside the connecting groove 61. A side of the sealing door 4 close to the connecting groove 61 is fixedly connected with a clamping ring 64, and the clamping ring 64 is located inside the sealing groove 63. An end of the clamping ring 64 away from the sealing door 4 is fixedly connected with a sealing ring 65, and the sealing ring 65 is located inside the sealing groove 63. Two connecting arms 66 are provided on one side of the surface of the sealing door 4, and the two connecting arms 66 are connected by a connecting column 68.

[0023] according to Figure 3As shown, one end of the two connecting arms 66 away from the sealing door 4 is rotatably connected to the first connecting block 67, and the first connecting block 67 is located on the side of the cabinet 1 and fixedly connected. By setting the connecting arm 66 and the first connecting block 67, the connecting arm 66 can be rotated and moved inside the first connecting block 67, thereby reducing the situation where the connecting arm 66 is difficult to move and rotate when the equipment is in use, causing the sealing door 4 to be difficult to effectively separate from the cabinet 1. A second connecting block 69 is fixedly connected to the side of the cabinet 1, and a gas rod 610 is rotatably connected inside the second connecting block 69. The gas rod 610 is provided to facilitate the movement of the connecting column 68 and the sealing door 4. The end of the gas rod 610 away from the second connecting block 69 is fixedly connected to a connecting head 611, and the connecting head 611 is located on the surface of the connecting column 68 and is rotatably connected. The connecting head 611 is provided to facilitate the movement and rotation of the connecting column 68.

[0024] according to Figure 4-Figure 6 As shown, an auxiliary component 7 is provided on the side of the sealed door 4, and the auxiliary component 7 includes a connecting plate 71 and a mounting block 72. The connecting plate 71 is fixedly connected to the side of the sealed door 4, and the mounting block 72 is fixedly connected to the side of the cabinet 1. One end of the mounting block 72 is rotatably connected to a swivel 76, and the end of the swivel 76 away from the mounting block 72 is fixedly connected to a rotating column 73, and the end of the rotating column 73 away from the swivel 76 is fixedly connected to a fixing block 74. A fixing groove 75 is provided on the surface of the connecting plate 71, and the fixing block 74 is clamped inside the fixing groove 75. The surface of the rotating column 73 is fixedly connected to a connecting The connecting ring 77 and the surface of the rotating column 73 are slidably connected with a moving ring 78, and the surface of the moving ring 78 is fixedly connected with a first spring 79. The end of the first spring 79 away from the connecting ring 77 is fixedly connected to the surface of the connecting ring 77. The first spring 79 is provided with a reset elastic force for the moving ring 78, so that the block 712 can be tightly inserted into the slot 711, thereby ensuring the stability of the sealing door 4 after auxiliary fixation. At the same time, during the operation of rotating the rotating column 73, the elastic buffer of the spring can also reduce the impact force between the components, thereby avoiding damage to the components due to excessive force.

[0025] according to Figure 6 As shown, the lower end of the movable ring 78 is rotatably connected to a rotating arm 710, and the end of the rotating arm 710 away from the movable ring 78 is fixedly connected to a clamping block 712. The clamping block 712 is provided to facilitate limiting the rotating arm 710. A clamping groove 711 is provided on the side of the mounting block 72, and the clamping block 712 is located inside the clamping groove 711 and clamped.

[0026] according to Figure 7As shown, a pressure reducing device 8 is provided inside the surface of the sealing door 4, and the pressure reducing device 8 includes a pressure reducing cover 81 and a baffle 82. The pressure reducing cover 81 is fixedly connected to the surface of the sealing door 4, and the baffle 82 is arranged inside the pressure reducing cover 81. The sides around the baffle 82 are fixedly connected with rubber strips 83. The inside of the pressure reducing cover 81 is fixedly connected with a slide bar 84, and the slide bar 84 is located inside the baffle 82 and is slidably connected. One end of the slide bar 84 away from the pressure reducing cover 81 is fixedly connected to a limited block 85. The surface of the slide bar 84 is sleeved with a second spring 86, and the two ends of the second spring 86 are respectively fixedly connected to the surface of the baffle 82 and the inside of the pressure reducing cover 81. The surface of the pressure reducing cover 81 is fixedly connected The limiting rod 88 provides a restoring elastic force for the baffle 82 by setting a second spring 86, so that the baffle 82 can return to its initial position after the pressure returns to normal, ensuring that the decompression device 8 can be reused and continuously exert the decompression function. The surface of the limiting rod 88 is slidably connected to a protective plate 87, and the end of the limiting rod 88 away from the decompression cover 81 is fixedly connected to a blocking block 89. The protective plate 87 is provided to protect the exhaust hole. The surface of the limiting rod 88 is sleeved and connected to a third spring 810, and the two ends of the third spring 810 are respectively located on the surface of the protective plate 87 and the surface of the blocking block 89 and are fixedly connected. The third spring 810 is provided to facilitate the application of a restoring elastic force to the protective plate 87.

[0027] The effect achieved by the entire mechanism is as follows: when the device is in use, the user rotates the sealing door 4 to engage with the surface of the cabinet 1, and then starts the gas rod 610 to drive the connecting head 611 to move and drive the connecting column 68 to move. When the connecting column 68 moves, it drives the connecting arm 66 to move the sealing door 4. Then the connecting arm 66 moves inside the first connecting block 67, and the sealing door 4 is clamped inside the connecting groove 61 on the surface of the cabinet 1. Then the clamping ring 64 is set inside the sealing groove 63, and then the rubber ring 62 is combined with the surface of the sealing door 4. When the clamping ring 64 is squeezed inside the sealing groove 63, the sealing ring 65 and the inside of the sealing groove 63 are completely filled. After the sealed door 4 is combined with the cabinet 1, the user rotates the rotating column 73 to drive the rotating head 76 to rotate inside the mounting block 72, and then pulls the rotating column 73 to drive the rotating head 76 to move inside the mounting block 72. Then the rotating column 73 drives the fixed block 74 to engage with the inside of the connecting plate 71, and then pulls the rotating arm 710 to drive the moving ring 78 to move on the surface of the rotating column 73. When the moving ring 78 moves, it drives the first spring 79 to displace and deform to generate elastic force. Then the moving ring 78 drives the connecting ring 77 to move the rotating column 73 and the rotating head 76 inside the mounting block 72 through the first spring 79. When the rotating column 73 moves, it drives the fixed block 74 to move inside the fixing groove 75. The rotating arm 710 is connected with the lower end of the mounting block 72, and then the rotating arm 710 is loosened. Then the first spring 79 drives the moving ring 78 to set the side of the rotating arm 710 and the mounting block 72. The rotating arm 710 drives the clamping block 712 to clamp the inside of the clamping groove 711 to tighten the sealing door 4 at one end of the connecting plate 71 and combine it with the cabinet 1. By setting the sealing device 6 and the auxiliary component 7, the sealing door 4 is effectively tightly combined, and the sealing door 4 and the surface of the cabinet 1 are tightly installed. It is difficult for the existing equipment to seal the sealing door 4 and the cabinet 1, which is easy to cause the sulfur hexafluoride gas inside the equipment to leak easily. Leakage may easily cause physical damage to the user by inhalation. The sealing device 6, through the cooperation of the rubber ring 62, the clamping ring 64, the sealing ring 65 and the gas rod 610, can quickly install and combine the sealing door 4 and the cabinet 1 for preliminary sealing. At the same time, the auxiliary component 7, with the help of the rotating head 76, the rotating column 73, the fixing block 74 and the related springs, the clamping block 712 and other components, tightly combines the sealing door 4 and the cabinet 1, greatly improving the tightness and reliability of the seal, effectively preventing the leakage of sulfur hexafluoride gas, ensuring the safe and stable operation of the ring network cabinet and the safety of the surrounding environment, and improving the use and installation efficiency.

[0028] When the device is in use, when an arc is generated inside the cabinet 1, the sulfur hexafluoride gas expands, and then the gas pushes the baffle 82 to move. When the baffle 82 moves, it drives the rubber strip 83 to move inside the decompression cover 81, and then the baffle 82 moves on the surface of the slide bar 84. When the baffle 82 moves, it drives the second spring 86 to displace and deform to generate elastic force. When the baffle 82 moves, it squeezes the air inside the decompression cover 81, and then the air inside the decompression cover 81 pushes the protective plate 87 to move on the surface of the limit rod 88. When the protective plate 87 moves, it drives the third spring 810 to displace and deform to generate elastic force to reduce the pressure of the sulfur hexafluoride gas inside the device. By setting the decompression device 8, the inside of the device can be effectively The gas is decompressed, which plays a role in decompressing and relieving force inside the equipment, reducing the equipment when it is in use. When an arc is generated inside the equipment, the sulfur hexafluoride gas quickly absorbs electricity to cool down and protect the inside of the equipment. After the sulfur hexafluoride gas absorbs a large amount of energy, it tends to expand rapidly and squeeze the inner wall of the cabinet 1, which is easy to cause damage to the inner wall of the cabinet 1 for a long time. This decompression device 8, through the cooperation of components such as the decompression cover 81, the baffle 82, the spring and the protective plate 87, can effectively decompress the sulfur hexafluoride gas that expands at high pressure inside the cabinet 1. Compared with equipment without decompression measures, the adaptability of the equipment to gas expansion is greatly improved, and the service life of the equipment is prolonged.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sulfur hexafluoride gas pressure relief ring main unit, comprising a cabinet body (1), a cabinet door (2), a display (3), a sealing door (4) and a base (5), characterized in that: The cabinet door (2) is disposed on the surface of the cabinet body (1); the display (3) is disposed on the surface of the cabinet door (2) and is fixedly connected thereto; the sealing door (4) is disposed on the surface of the cabinet body (1); the base (5) is disposed at the lower end of the cabinet body (1); a sealing device (6) is disposed on the surface of the sealing door (4); the sealing device (6) comprises a connecting groove (61) and a rubber ring (62); the connecting groove (61) is disposed on the surface of the cabinet body (1); the rubber ring (62) is disposed inside the connecting groove (61) and is fixedly connected thereto; and the connecting groove (61) is disposed inside A sealing groove (63), the sealing door (4) is arranged inside the connecting groove (61), a clamping ring (64) is fixedly connected to a surface of the sealing door (4) close to the connecting groove (61), the clamping ring (64) is arranged inside the sealing groove (63), an end of the clamping ring (64) away from the sealing door (4) is fixedly connected to a sealing ring (65), the sealing ring (65) is arranged inside the sealing groove (63), and two connecting arms (66) are arranged on one side of the surface of the sealing door (4), and the two connecting arms (66) are connected via a connecting column (68).

2. The sulfur hexafluoride gas pressure relief ring main unit according to claim 1, characterized in that: One end of the two connecting arms (66) away from the sealed door (4) is rotatably connected to a first connecting block (67), and the first connecting block (67) is located on a side surface of the cabinet (1) and is fixedly connected.

3. The sulfur hexafluoride gas pressure relief ring main unit according to claim 1, characterized in that: A second connection block (69) is fixedly connected to the side of the cabinet (1), and a gas rod (610) is rotatably connected inside the second connection block (69).

4. A sulfur hexafluoride gas pressure relief ring main unit according to claim 3, characterized in that: One end of the gas rod (610) away from the second connection block (69) is fixedly connected to a connection head (611), and the connection head (611) is rotatably connected to the surface of the connection column (68).

5. The sulfur hexafluoride gas pressure relief ring main unit according to claim 1, characterized in that: An auxiliary component (7) is provided on the side of the sealed door (4), and the auxiliary component (7) comprises a connecting plate (71) and a mounting block (72), the connecting plate (71) being fixedly connected to the side of the sealed door (4), the mounting block (72) being fixedly connected to the side of the cabinet (1), one end of the mounting block (72) being rotatably connected to a rotating head (76), one end of the rotating head (76) being fixedly connected to a rotating column (73) away from the mounting block (72), and one end of the rotating column (73) being fixedly connected to the rotating head (76). The end of the connecting plate (71) is fixedly connected with a fixing block (74), a fixing groove (75) is formed on the surface of the connecting plate (71), the fixing block (74) is located inside the fixing groove (75) and is clamped, the surface of the rotating column (73) is fixedly connected with a connecting ring (77), the surface of the rotating column (73) is slidably connected with a moving ring (78), the surface of the moving ring (78) is fixedly connected with a first spring (79), and one end of the first spring (79) away from the connecting ring (77) is fixedly connected to the surface of the connecting ring (77).

6. The sulfur hexafluoride gas pressure relief ring main unit according to claim 5, characterized in that: The lower end of the moving ring (78) is rotatably connected to a rotating arm (710), and one end of the rotating arm (710) away from the moving ring (78) is fixedly connected to a clamping block (712).

7. The sulfur hexafluoride gas pressure relief ring main unit according to claim 6, characterized in that: A slot (711) is provided on the side of the mounting block (72), and the slot (712) is located inside the slot (711) for locking.

8. The sulfur hexafluoride gas pressure relief ring main unit according to claim 1, characterized in that: A decompression device (8) is provided inside the surface of the sealing door (4), and the decompression device (8) comprises a decompression hood (81) and a baffle (82). The decompression hood (81) is fixedly connected to the surface of the sealing door (4), and the baffle (82) is arranged inside the decompression hood (81). The side surfaces of the baffle (82) are fixedly connected with rubber strips (83). The inside of the decompression hood (81) is fixedly connected with a sliding rod (84), and the sliding rod (84) is slidably connected inside the baffle (82). One end of the sliding rod (84) away from the decompression hood (81) is fixedly connected to a limiting block (85). The surface of the sliding rod (84) is sleeved and connected with a second spring (86), and the two ends of the second spring (86) are respectively fixedly connected on the surface of the baffle (82) and inside the decompression hood (81). The surface of the decompression hood (81) is fixedly connected with a limiting rod (88).

9. The sulfur hexafluoride gas pressure relief ring main unit according to claim 8, characterized in that: A protective plate (87) is slidably connected to the surface of the limiting rod (88), and a blocking block (89) is fixedly connected to one end of the limiting rod (88) away from the decompression cover (81).

10. A sulfur hexafluoride gas pressure relief ring main unit according to claim 9, characterized in that: A third spring (810) is sleeved and connected to the surface of the limiting rod (88), and two ends of the third spring (810) are respectively located on the surface of the protective plate (87) and the surface of the blocking block (89) and are fixedly connected thereto.

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